#include <iostream>
using namespace std;
namespace Rong{
enum day {
Monday, Tuesday, Wednseday, Thur, Fry
};
}
using namespace Rong;
static Rong::day d1=Tuesday;
Rong::day& operator++(Rong::day& d){
	d=(Rong::day)(d-1);
	return d1;
}

int main(){
	Rong::day d=Thur;
	cout << " d: "<< d << " "<< ++d << " d: " << d << " "<< ++d << " d: " << d <<endl;
	return 0;
}
